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Any Guesses?


jackLindr

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Hi

I know this may be a little hard to ID, since I don't have much info about it.

My friend found it in his garden in Denmark. It's flint (of cause), but that more or less all I know.

The pattern looks pretty distinct, so I thought someone might have an idea about what this might be.

Thanks for the help!

Jack

post-9564-0-46864100-1368486929_thumb.jpg

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It is a cool fossil, at first glance it looks a bit like a "side view" of Favosites, but there is some more structure to it on close inspection.

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Oh yes, I see what you mean... That's a very good guess. It looks like it's filled with tiny round things. Especially at the top. Don't know if it's part of the fossile itself or if it's something else...

And thanks for the reply!

Edited by jackLindr
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I see the impression of a sea urchin's test, I believe.

"There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant

“Try to learn something about everything and everything about something.” - Thomas Henry Huxley

>Paleontology is an evolving science.

>May your wonders never cease!

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I agree...Zooming in close to those tiny structures screams "echinoid" to me.

At first it screamed "Michelin" to me, but I'm new at this. :P

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Definitely echinoid. Danish chert (flint) is Cretaceous, and Favosites was a Silurian/Devonian coral.

Don

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Great! Thanks a lot of all the replies...

So the tiny round things you can see are the spines? Or at least where the used to be?

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Hi,

The small squares are the tracks of interambulacral plates and the little points inside are the tracks of tubers (where spines are hung).

----------------------
OUTIL POUR MESURER VOS FOSSILES : ici

Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici
Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici
Mâchoires sélaciennes récentes : ici
Hétérodontiques et sélaciens : ici
Oeufs sélaciens récents : ici
Otolithes de poissons récents ! ici

Un Greg...

Badges-IPFOTH.jpg.f4a8635cda47a3cc506743a8aabce700.jpg Badges-MOTM.jpg.461001e1a9db5dc29ca1c07a041a1a86.jpg

 

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Nice. Thanks! Not only did I find out what the fossile was, I learned some new fancy words like "interambulacral plates" :D

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  • 4 months later...

Hi
Definitely a fossilised sea urchin. The black /blueish colour of the Danish chert (flint) tells us that it is from the Cretaceous. Danish flint with other colours then black /blueish are normaly from early paleogene.

I can see you are located in Denmark so there are a couple of danish websites about
sea ​​urchins.

http://www.vestjyskstenklub.dk/galleri/sopindsvin/indholdsfortegnelse.html

http://www.geolsba.dk/echinoids/DK-artsliste.html

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